Pith Number

pith:USP3MR3O

pith:2019:USP3MR3OWZ67APL75IVVUHPX44

not attested not anchored not stored refs pending

Variational Operators, Symplectic Operators, and the Cohomology of Scalar Evolution Equations

Emrullah Yasar, Mark E. Fels

arxiv:1902.08178 v1 · 2019-02-08 · math.DG · math-ph · math.MP · nlin.SI

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{USP3MR3OWZ67APL75IVVUHPX44}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-17T23:53:01.877427Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a49fb6476eb67df03d7fea2b5a1df7e71b52c632339c24136889510446d2f009

Aliases

arxiv: 1902.08178 · arxiv_version: 1902.08178v1 · doi: 10.48550/arxiv.1902.08178 · pith_short_12: USP3MR3OWZ67 · pith_short_16: USP3MR3OWZ67APL7 · pith_short_8: USP3MR3O

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/USP3MR3OWZ67APL75IVVUHPX44 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: a49fb6476eb67df03d7fea2b5a1df7e71b52c632339c24136889510446d2f009

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "626f41a5cb6af9bdd0855511b208bd9cfbb0df85e7f762eedb6d2d91cc3ab269",
    "cross_cats_sorted": [
      "math-ph",
      "math.MP",
      "nlin.SI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2019-02-08T20:18:04Z",
    "title_canon_sha256": "6671678160d2d9c3e0b56e06e0e6610098f3736e95d2149379b362fe2329b766"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.08178",
    "kind": "arxiv",
    "version": 1
  }
}